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Finding the Fourth Proportional to 171,572.22, 257,353.47 and 66,414.78

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Solution

The fourth proportional to 171,572.22, 257,353.47 and 66,414.78 is: 99,620.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,572.22 : 257,353.47 = 66,414.78 : x
  2. Step 2: Convert to fraction form
    171,572.22/257,353.47 = 66,414.78/x
  3. Step 3: Cross multiply
    171,572.22x = 257,353.47 × 66,414.78
  4. Step 4: Simplify right side
    171,572.22x = 17,092,074,092.29
  5. Step 5: Solve for x
    x = 17,092,074,092.29/171,572.22
  6. Step 6: Final answer
    x = 99,620.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.